What are the four basic functions of nonverbal cue...

What are the four basic functions of nonverbal cues? Provide examples of each.
1) They supplement verbal cues by adding emphasis to certain words (example: crossing your arms across your chest); (2) they can substitute verbal cues (example: frowning, yawning or a raised eye brow); (3) they can contradict the verbal cues (example: someone's head continuously bob and their eyes are closed however they say they're interested in the presentation), and (4) they regulate the verbal cues (example: pausing and looking at someone to await a response).

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